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Not warm enough

Richard Fahie
Richard Fahie Member Posts: 3
in THE MAIN WALL
I want to replace my slantfin hw radiator with a more efficient one. Increasing the lenght of the slantfin is a problem. Does anybody have any recommendations? I'm particularly interested in stackable hw radiators such as Vasco Hydronic but I don't know where to purchase them.
Thanks
Richie

Comments

  • Michal
    Michal Member Posts: 213
    slant fin

    look into slantfin, they have the 80 series as well as other stacked 2 row models, there is also vulcan radiator company, both you should be able to get at your local heating supply house
  • Richard Fahie
    Richard Fahie Member Posts: 3
    Not warm enough

    Thanks for the idea! After finally finding the Hydronic Alternative web page (it's not Vasco-Hydronic Alternatives as stated in the magazine), my dad and I realized it was not an alternative. I believe that the Slant fin 80 offers about 50% more heat than the Slant fin 15 which is currently installed and looks like the way I'm going to go. Would it matter if the feed to the radiator is 1/2" or 3/4" as far as the heat in the room goes?
    Thanks
    Richie
  • Michal
    Michal Member Posts: 213
    sizes

    you know, from my being a engineer, it troubles me to see 1/2" on radiation, I do not and comapny wide we do not use less then 3/4" on baseboard and you should not either. use 3/4"
  • Richard Fahie
    Richard Fahie Member Posts: 3
    slant fin

    Bothers me too. Actually I'm not sure it's 1/2" or not. It's the only thing in the whole construction I let another person do, and I feel they probably did it the cheap easy way. I'll check it as soon as I get a chance.
    Thanks
    Richie
    BTW Im a EE.
    73's
  • Michal
    Michal Member Posts: 213
    cool

    you know for radiant its fine, but on fine tube, no maufacturer makes 1/2" radiation. but look into that and see if you can do 3/4 thats why you having trouble, too little flow, UNLESS YOU GET RID OF THE 1/2" THE SLANTFIN 8O WILL NOT HELP, iam mechanical class of 2000
  • Boiler Guy
    Boiler Guy Member Posts: 585
    1/2\" should

    be more than sufficient to feed one section of fin-tube radiation - even double stacked. Afterall most zone valves only have a 5/16-3/8 port. If my memory serves me right, I believe 1/2 copper is capable of carrying 40,000Btuh. Please correct me if I am wrong.
  • Michal
    Michal Member Posts: 213
    capacities as listed

    capable of of only 1 gpm

    1/2" = 1 gpm times 20 degree delta t times 500 (conversion factor) equals 10,000 btuh

    3/4" = 2-1/2 to 3 gpm times 20 degree delta t times 500 (converion factor) equals 30,000 btuh
  • Tony_8
    Tony_8 Member Posts: 608
    capacity

    1/2" good for 1-1/2 gpm, sometimes 2. 3/4" up to 4 gpm.
  • Michal
    Michal Member Posts: 213
    watch velocity for noise

    I think those numbers are at the upper velocities where you will start to get noice from them, havent checked the numbers, but what i stated we have been using for designing projects and these are the flows we use.FINALLY FOLLOW MANUFACTURERS RECOMMENDATIONS, FIN TUBE IS 3/4" DO NOT USE LESS, IF 1/2" WERE ACCEPTABLE THEY WOULD MAKE 1/2" FIN TUBE
  • Michal
    Michal Member Posts: 213
    watch velocity for noise

    I think those numbers are at the upper velocities where you will start to get noice from them, havent checked the numbers, but what i stated we have been using for designing projects and these are the flows we use. FINALLY FOLLOW MANUFACTURERS RECOMMENDATIONS, FIN TUBE IS 3/4" DO NOT USE LESS, IF 1/2" WERE ACCEPTABLE THEY WOULD MAKE 1/2" FIN TUBE
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